CMS-953 Create initial framework for indexing content

Added more tests
CMS-953 Create initial framework for indexing content

Removed unnecessary component-annotations
CMS-736 Introduce CRUD API for Relationship
Added tests for CreateOrUpdateRelationshipRpcHandler.
CMS-926 Relationship Type RPC get-method needs to support XML
Merge branch 'master' into CMS-926
CMS-926 Relationship Type RPC get-method needs to support XML
 CMS-970: Top Bar - Improvements to tab selector